Shuttle tension and take-up mechanism



June 24, 1930.

A. s. HUTCHINS 1,766,904

SHUTTLE TENSION AND TAKE-UP MECHANISM Filed Nov. 24, 1928 Z Shee tS-Sheet 1 "NILE 1 Jinan/7a flan/v 9. flaw/70x45 A770 PNEy-J June 24, 1930. A, s, HUTCHINS 1,766,904

SHUTTLE TENSION AND TAKE-UP MECHANISM Fijled Nov. 24. 1928 2 Sheets-Sheet 2 zg/ s a? z: 3.5 2? 34' W I 5 a -4 SK/VZ/TCH/A/S r lwjmg Patented June 24, 1930 i'reo STATES 7 ALLAN S. HU'TCHINS, F \VORCESTEE, MASSACHUSETTS;ASSIGNOB; TO CROMPTON 8a imevr tns LOOIVI MASSACHUSETTS sno'r'rLn TENSION Ann TAKE-UP MECHANISM Application filed November 24, 1928. Serial No. 321,682.

This invention relates to a shuttle tension and talre-up mechanism of the general type disclosed and claimed in my prior applicatioirSerial No. 250,360, filed January 30, 1928.

No provision is made in the shuttle eye shown in my prior application for applying friction to the weft during the initial flight of the shuttle after weft replenishment. Grdinarily this is of no importance, but 111 line silk fabrics the insertion of even a single pick of weft under less than the usual tension may be perceptible in the finished tiroduet.

It is the object of my present inventlon to provide a supplemental friction device associated with the shuttle eye and effective to apply friction during the initial flight of the shuttle after automatic Weft replenishment.

A further object of theinvention is to provide a supplemental friction device so designed and positioned that it will cease to apply friction to the weft after the shuttle is fully threaded.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings in whicl Fig. 1 is a plan view of a shuttle embodying my improvements;

Fig. 2 is an enlarged plan View of the threading end of the shuttle, with certain parts removed;

I Fig. 3 is a side elevation of the threading end of the shuttle, looking in the direction of the arrow 3 in Fig. 2;

Fig. t is a sectional elevation, taken along the line el4 in Fig. 2;

Fig. 5 is a view similar to Fig. 4, but show ing the parts in a different position;

Figs. 6 and 7 are transverse sectional elevations, taken along the lines 6-6 and 7-7 in Fig. 3 respectively;

Fig. 8 is a side elevation of the top plate of the shuttle threading mechanism;

Fig. 9 is a sectional side elevation of said plate;

- Fig. 10 is an end view thereof, looking in the direction of the arrow 10 in Fig. 8;

Fig. 11 is a transverse sectional elevation, taken along the line 11-11 in Fig. 8;

Fig. 12 is abottom view of the plate, 1001:- ing in the direction of the arrow 12in Fig. 8;

Fig. 13 is a side elevation showing the relative positions of the regular take-up and tension members and the supplementary friction device;

Figs. 14, 15 and 16 are diagrammatic views similar to Fig. 13 and showing successive operating positions of the parts; i

Fig. 17 is a perspective view of the supple mentary-friction member; and I Fig. 18 is a detail sectional view, taken along the line 18-18 in Fig. 17

Referring to the drawings, I have shown a shuttle S having spring jaws 20 to support a bobbin B in the manner customary in automatic looms. The interior of the shuttle S is preferably lined with portions of fur F or other similar material, adapted to frictionally engage the weft on the bobbin B and prevent the same, from being pulled too loosely therefrom. This friction material F is particularly useful with silk'filling.

The shuttle S isprovided with a threading recess or opening 22 atone end thereof, in

which the take-up and tension members 23 and 241 are mounted. A top plate 25 overlies the opening or recess 22 and guides the thread to a slot 26 (Fig. 3) in the front side wall thereof, through which the thread is conducted to the eye 27. The tension members are each formed of a single piece of wire bent to provide guide portions 28 (Fig. 4) and V-shaped entrance portions 29. The ends of the tension members 23 and 24 are turned outward, as indicated in Fig. 7, and are mounted in openings in blocks or bushings 3O fixed in the side walls of the shuttle recess 22.

An elastic band or other yielding; member 32 is looped around a wire clip 33 secured by a screw 34 at the front end of the recess 22. The ends of the band 32 are connected to a screw 35 in'such a way that by turning the screw, the tension on the bands may be adjusted as desired.

The upper and lower portions of the band WORKS, 013 WORCESTER, MASSACHUSETS, A CORPORATION" 015 32 extend between offset portions of the tension and take-up members 23 and 24, as shown in Fig. 5, and act to move the members 23 and 24 yieldingly to the position shown in Fig. 4.

The parts thus far described are substantially as shown and described in my prior application above identified, to which reference is made for a more detailed description.

In the present application, I have added a supplementary friction device 40, secured to the under side of the top plate 25. This device 40 is preferably formed of fine spring wire and comprises a coil 41 and a pair of thread-engaging elements 42 and 43. The endsof the elements 42 and 43 are turned outward, as indicated at 45 and 46 (Fig. 17), and the out-turned portion 45 is preferably secured to the plate 25 by soldering or brazing the same thereto. The portion 46 preferably slides loosely against an abutment or shoulder47 on the under side of the plate 25, but may be fixed thereto. The looped free ends of the members 42 and 43 are disposed closely adjacent each other and are pressed toward each other by the tension of the coil 41.

The supplementary tension device 40 is mounted in such a position in the shuttle that when the thread is drawn from the bobbin in the initial flight of the shuttle, as indicated in Fig. 14, it will be drawn between the members 42 and 43 and a light tension will thereby be provided for the weft during such initial flight, as indicated in Fig. 18. As the shuttle begins its return flight, the weft W enters between the tension members 23 and 24, as indicated in Fig. 15, moving the tension members to the position indicated in Fig. 16 and at the same time drawing the weft downward out of the supplementary friction device 40. Thereafter the regular take-up and tension members operate as described in my prior application, the supplementary tension device being inoperative after the initial flight of the shuttle following weft replenislnnent.

By the use of this supplementary friction device, however, I avoid the insertion of an initial pick of untensioned weft, which, as previously stated, has been found objectionable in certain very fine fabrics and particularly in silk weaves.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is 1. In a selfthreading shuttle, a shuttle eye, tension mechanism associated therewith and operative to tension the weft during the normal continued running of the shuttle, and a tension device having in said shuttle and associated with said eye, said device two cooperating spring tension members positioned but effective to engage and tension the weft before complete threading thereof, the weft being pulled from between said spring tension members when the shuttle is completely threaded.

In testimony whereof I have hereunto affixed my signature.

ALLAN S. HUTGHINS. 

